<template>
  <div>
    <div class="main">
      <keep-alive>
        <router-view/>
      </keep-alive>
    </div>
    <van-tabbar v-model="active" @change="changeTabbar(active)">
      <van-tabbar-item icon="shop">首页</van-tabbar-item>
      <van-tabbar-item icon="records">列表</van-tabbar-item>
      <van-tabbar-item icon="cart">购物车</van-tabbar-item>
      <van-tabbar-item icon="contact">会员中心</van-tabbar-item>
    </van-tabbar>
  </div>
</template>

<script>
export default {
  data() {
    return {
      active:0,
      nowPath:'',
    }
  },    
  mounted(){
      this.changeTabBarActive()
    },
  updated() {
      this.changeTabBarActive()      
    },
  methods: {
    changeTabBarActive(){
      this.nowPath = this.$route.path
       if(this.nowPath=='/Cart'){
          this.active=2
       }
    },
    changeTabbar(active){
      switch (active) {
        case 0:
          this.$router.push({name:'ShoppingMall'})
          break;
        case 1:
          this.$router.push({name:'CategoryList'})
          break;
        case 2:
          this.$router.push({name:'Cart'})
          break;   
        case 3:
          this.$router.push({name:'Member'})
          break;   
      }
    }
  },
  components: {

  }
}
</script>

<style>

</style>
